This article helps to address vulnerability CVE-2026-31431 CVE-2026-43284 CVE-2026-43500 in Paragon Active Assurance,.

First validate if your server is impacted using below commands-

grep -qE '^algif_aead ' /proc/modules && echo "Affected module is loaded" || echo "Affected module is NOT loaded"
grep -qE '^(esp4|esp6|rxrpc) ' /proc/modules && echo "Affected modules are loaded" || echo "Affected modules are NOT loaded"

If Impacted, apply below workaround and if NOT, then no need to take any action.

To fix the above vulnerabilities , you can apply the workaround ->

sudo apt update && sudo apt upgrade

 or 

sudo apt update && sudo apt install --only-upgrade kmod